keep your mouth shut
イディオム440/1,085to not talk about sth to sb because it is a secret or because it will upset or annoy them
36 本の映画に登場 · His Girl Friday
Lay low and keep your mouth shut.
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イディオム · 440 / 1,085
to not talk about sth to sb because it is a secret or because it will upset or annoy them